• 제목/요약/키워드: bipartite matching matching

검색결과 33건 처리시간 0.153초

Cross-Talk: D2D Potentiality Based Resource Borrowing Schema for Ultra-Low Latency Transmission in Cellular Network

  • Sun, Guolin;Dingana, Timothy;Adolphe, Sebakara Samuel Rene;Boateng, Gordon Owusu
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제13권5호
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    • pp.2258-2276
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    • 2019
  • Resource sharing is one of the main goals achieved by network virtualization technology to enhance network resource utilization and enable resource customization. Though resource sharing can improve network efficiency by accommodating various users in a network, limited infrastructure capacity is still a challenge to ultra-low latency service operators. In this paper, we propose an inter-slice resource borrowing schema based on the device-to-device (D2D) potentiality especially for ultra-low latency transmission in cellular networks. An extended and modified Kuhn-Munkres bipartite matching algorithm is developed to optimally achieve inter-slice resource borrowing. Simulation results show that, proper D2D user matching can be achieved, satisfying ultra-low latency (ULL) users' quality of service (QoS) requirements and resource utilization in various scenarios.

Bipartite 매칭을 이용한 2D/3D 검색 시스템 (2D/3D Retrieval System Using Bipartite Matching)

  • 임삼;추현곤;김희율
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2001년도 제14회 신호처리 합동 학술대회 논문집
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    • pp.3-6
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    • 2001
  • 본 논문에서는 Bipartite 매칭을 이용한 2D/3D 검색 시스템을 제안한다. 2D/3D 검색 시스템에서 3D 물체 사이의 유사도는 각각의 2D 실루엣 이미지들간의 매칭을 통해 얻어진다. 그러나 기존의 매칭 방법은 전체 매칭(Fuii MatchinE) 방법으로 연산량이 많기 때문에 Bipartite 매칭 방법을 사용하여 연산량을 줄이고 검색 속도의 성능을 향상시킨다. 기존의 방법과 제안된 방법의 검색 속도 비교를 통해 Bipartite 매칭을 이용한 2D/3D 검색 시스템의 효율성을 나타낸다.

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On the Heterogeneous Postal Delivery Model for Multicasting

  • Sekharan, Chandra N.;Banik, Shankar M.;Radhakrishnan, Sridhar
    • Journal of Communications and Networks
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    • 제13권5호
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    • pp.536-543
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    • 2011
  • The heterogeneous postal delivery model assumes that each intermediate node in the multicasting tree incurs a constant switching time for each message that is sent. We have proposed a new model where we assume a more generalized switching time at intermediate nodes. In our model, a child node v of a parent u has a switching delay vector, where the ith element of the vector indicates the switching delay incurred by u for sending the message to v after sending the message to i-1 other children of u. Given a multicast tree and switching delay vectors at each non-root node 5 in the tree, we provide an O(n$^{\frac{5}{2}}$) optimal algorithm that will decide the order in which the internal (non-leaf) nodes have to send the multicast message to its children in order to minimize the maximum end-to-end delay due to multicasting. We also show an important lower bound result that optimal multicast switching delay problem is as hard as min-max matching problem on weighted bipartite graphs and hence O(n$^{\frac{5}{2}}$) running time is tight.

최대 매칭 문제의 최소차수 정점 간 간선 선택 알고리즘 (Algorithm for Minimum Degree Inter-vertex Edge Selection of Maximum Matching Problem)

  • 이상운
    • 한국인터넷방송통신학회논문지
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    • 제22권5호
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    • pp.1-6
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    • 2022
  • 본 논문은 최대 매칭 문제(MCM)를 다루었다. MCM은 일반적으로 증대경로 기법으로 구한다. 일반 그래프에 대한 MCM을 구하는 증대경로 알고리즘으로는 $O({\sqrt{n}}m)$ 복잡도, 이분 그래프에 대해서는 O(m log n) 복잡도를 갖고 있다. 반면에, 본 논문에서는 주어진 그래프가 일반 그래프나 이분그래프의 그래프 종류에 상관없이 항상 O(n) 복잡도로 MCM을 구하는 알고리즘을 제안하였다. 제안된 알고리즘은 "최대 매칭을 구하기 위해서는 가능한 많은 정점 쌍의 간선을 선택해야만 한다."는 기본 원리에 근거하여 최소차수 정점 u와 NG(u)들 중 최소차수 정점 𝜐간 간선 {u,𝜐}를 𝜈(G)=k회 단순히 선택하는 간단한 방법이다. 제안된 알고리즘을 일반그래프와 이분그래프의 다양한 실험 데이터들에 적용한 결과 𝜈(G)를 정확하게 구할 수 있음을 보였다.

Structural results and a solution for the product rate variation problem : A graph-theoretic approach

  • 최상웅
    • 한국경영과학회:학술대회논문집
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    • 한국경영과학회 2004년도 추계학술대회 및 정기총회
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    • pp.250-278
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    • 2004
  • The product rate variation problem, to be called the PRVP, is to sequence different type units that minimizes the maximum value of a deviation function between ideal and actual rates. The PRVP is an important scheduling problem that arises on mixed-model assembly lines. A surge of research has examined very interesting methods for the PRVP. We believe, however, that several issues are still open with respect to this problem. In this study, we consider convex bipartite graphs, perfect matchings, permanents and balanced sequences. The ultimate objective of this study is to show that we can provide a more efficient and in-depth procedure with a graph theoretic approach in order to solve the PRVP. To achieve this goal, we propose formal alternative proofs for some of the results stated in the previous studies, and establish several new results.

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Graph spectral 기법을 이용한 N:M 대응 폴리곤쌍 탐색 (Identification of N:M corresponding polygon pairs using a graph spectral method)

  • 허용;유기윤
    • 한국측량학회:학술대회논문집
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    • 한국측량학회 2010년 춘계학술발표회 논문집
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    • pp.11-13
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    • 2010
  • Combined with the indeterminate boundaries of spatial objects, n:m correspondences makes an object-based matching be a complex problem. In this study, we model the boundary of a polygon object with fuzzy model and describe their overlapping relations as a weighted bipartite graph. Then corresponding pairs including 1:0, 1:1, 1:n and n:m relations are identified using a spectral singular value decomposition.

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최근린 배차 규칙 기반 온라인 Personal Rapid Transit 배차 알고리즘 (An Online Personal Rapid Transit Dispatching Algorithm Based on Nearest Neighbor Dispatching Rule)

  • 한충균;권보배;김백현;정락교;이훈;하병현
    • 한국시뮬레이션학회논문지
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    • 제23권4호
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    • pp.97-109
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    • 2014
  • Personal Rapid Transit (PRT)는 차세대 대중교통 수단으로 에너지 효율적이며 높은 수준의 고객 서비스를 제공한다. 정류장에 동적으로 도착한 고객이 운송 서비스를 요청하면 PRT 시스템은 차량을 배차한다. 본 연구에서는 PRT 시스템을 위한 새로운 온라인 배차 알고리즘을 제시하였다. 제시된 알고리즘은 최근린(nearest neighbor) 배차 규칙을 기반으로 개발되었으며, 이분 매칭(bipartite matching)을 사용하여 다수의 PRT 차량과 고객을 동시에 고려하여 배차를 결정한다. 이 경우 전체 차량 중 배차 대상 차량의 선택 범위가 성능지표에 영향을 줄 수 있다. 따라서 본 연구에서는 차량의 상태를 고려하여 체계적으로 배차 차량을 선택하는 방법을 제시한다. 성능지표로 공차 이동거리와 고객 대기시간을 고려하였으며, 시뮬레이션 기법을 사용하여 배차 선택 범위에 따른 성능지표의 차이를 확인하였다. 그리고 기존의 배차 규칙과 비교하여 본 연구에서 제시하는 방법론이 우수하며 PRT 시스템에 적합한 것을 확인하였다.

Modeling and Simulation of Scheduling Medical Materials Using Graph Model for Complex Rescue

  • Lv, Ming;Zheng, Jingchen;Tong, Qingying;Chen, Jinhong;Liu, Haoting;Gao, Yun
    • Journal of Information Processing Systems
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    • 제13권5호
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    • pp.1243-1258
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    • 2017
  • A new medical materials scheduling system and its modeling method for the complex rescue are presented. Different from other similar system, first both the BeiDou Satellite Communication System (BSCS) and the Special Fiber-optic Communication Network (SFCN) are used to collect the rescue requirements and the location information of disaster areas. Then all these messages will be displayed in a special medical software terminal. After that the bipartite graph models are utilized to compute the optimal scheduling of medical materials. Finally, all these results will be transmitted back by the BSCS and the SFCN again to implement a fast guidance of medical rescue. The sole drug scheduling issue, the multiple drugs scheduling issue, and the backup-scheme selection issue are all utilized: the Kuhn-Munkres algorithm is used to realize the optimal matching of sole drug scheduling issue, the spectral clustering-based method is employed to calculate the optimal distribution of multiple drugs scheduling issue, and the similarity metric of neighboring matrix is utilized to realize the estimation of backup-scheme selection issue of medical materials. Many simulation analysis experiments and applications have proved the correctness of proposed technique and system.

Deadlock 회피책에 대한 개선방안 연구 (An Improvement of the Deadlock Avoidance Algorithm)

  • 김태영;박동원
    • 공학논문집
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    • 제1권1호
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    • pp.49-57
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    • 1997
  • 본 논문에서는 Habermann의 deadlock 회피책에 대한 기존의 방안을 향상시킬 수 있는 방법을 고안하였다. 먼저 correction, efficiency, concurrency 측면에서 기존의 개선 방법들을 비교 분석한 다음, 대표적인 Kameda의 개선방안을 심도있게 논의한다. Dinic의 알고리듬을 채택한 Kamedia의 방법에서는 실행시간 O($mn^1.5$)이 요구되지만 Karzanov의 wave method를 응용하여 본고에서 제안한 faster algorithm에서는 실행시간 O($mn^1.5$)이 됨을 보인다.

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Socially Aware Device-to-multi-device User Grouping for Popular Content Distribution

  • Liu, Jianlong;Zhou, Wen'an;Lin, Lixia
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제14권11호
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    • pp.4372-4394
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    • 2020
  • The distribution of popular videos incurs a large amount of traffic at the base stations (BS) of networks. Device-to-multi-device (D2MD) communication has emerged an efficient radio access technology for offloading BS traffic in recent years. However, traditional studies have focused on synchronous user requests whereas asynchronous user requests are more common. Hence, offloading BS traffic in case of asynchronous user requests while considering their time-varying characteristics and the quality of experience (QoE) of video request users (VRUs) is a pressing problem. This paper uses social stability (SS) and video loading duration (VLD)-tolerant property to group VRUs and seed users (SUs) to offload BS traffic. We define the average amount of data transmission (AADT) to measure the network's capacity for offloading BS traffic. Based on this, we formulate a time-varying bipartite graph matching optimization problem. We decouple the problem into two subproblems which can be solved separately in terms of time and space. Then, we propose the socially aware D2MD user selection (SA-D2MD-S) algorithm based on finite horizon optimal stopping theory, and propose the SA-D2MD user matching (SA-D2MD-M) algorithm to solve the two subproblems. The results of simulations show that our algorithms outperform prevalent algorithms.